The government denies that the IPS is a faulty instrument for measuring its progress on migration.

BBC: The truth behind UK migration figures

The objective was building an instrument that allows measuring the soil losses in situ.

UNESCO: AQUATACAMA

Untrue and dangerous: Early glaucoma is asymptomatic and can only be detected by measuring the pressure in the eyeball with an instrument.

FORBES: A Baker's Dozen Of Medical Myths That Concern Your Eyes

It involves an instrument sending a sound into the baby's ear and measuring the level of returned sound which calculates the level of hearing function.

BBC: Babies' hearing problems undiagnosed